Synthesis of Spiroborate Esters from 1,2-Aminoalcohols, Ethylene Glycol and Triisopropyl Borate: Preparation of (S)-1-(1,3,2-Dioxaborolan-2-yloxy)-3-Methyl-1,1-Diphenylbutan-2-Amine

(2S)-2-Amino-3-methyl-1,1-diphenylbutanol Bromobenzene L-Valine methyl ester hydrochloride Phenylmagnesium chloride Ethylene glycol Triisopropyl borate (-)-(S)-1-(1,3,2-Dioxaborolan-2-yloxy)3-methyl-1,1-diphenylbutan-2-amine Keywords: spiroborate eters; chiral organoboranes; chiral alcohols; borane reduction; catalysts; hazard alert; waste disposal; amino alcohols; oxazaborolidines